Dragon Ball Z: Budokai Tenkaichi 3

It's a pretty good fanservice game since it includes pretty much every DBZ character you can think of (including Random Purple Alien Guy Who Worked For Frieza I Think) but I could never get the hang of the controls, and many of the characters felt basically the same to play.

I've sunk more hours into this game than any other fighting game I've played, so the score gets a massive nostalgia boost. It perfectly captures the style of the show in a way no other game has and boasts loads of content, fanservice and a supermassive roster. Unfortunately it's too accurate to the show to a fault, which mean it's also ridiculously broken and horribly unbalanced. Ultimately your enjoyment of this game will depend upon your enjoyment of DBZ overall.